v3.10.0.1

CONTINGENCIES AND COMMITMENTS (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Commitments And Contingencies Disclosure Abstract |  |
Letter of credit requirement | $ 3,987 | $ 1,856

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant